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pf/mcm-41纳米复合材料的制备及其耐热性

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Abstract:

?采用原位聚合结合共混工艺制备了pf/mcm-41纳米复合材料,研究了耐热性.结果表明,当mcm-41粉的含量为20%时,pf/mcm-41纳米复合材料中mcm-41粉的分散性及有机-无机两相间的界面结合良好;与纯pf比较,复合材料的质量损失达到50%(质量分数)时的温度提高约70℃,分解结束时的温度提高约100℃.介孔mcm-41中的纳米级孔道能有效地限制其内树脂分子链的自由运动,是pf/mcm-41复合材料耐热性提高的机理.同时,其纳米级厚度的孔壁具有极好的耐热性和绝热性,在快速升温的条件下能延缓孔内树脂分子的热分解及分解产生的小分子产物的释放.

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